Charge carrier transport in defective reduced graphene oxide as quantum dots and nanoplatelets in multilayer films
Graphene is a breakthrough 2D material due to its unique mechanical, electrical, and thermal properties, with considerable responsiveness in real applications. However, the coverage of large areas with pristine graphene is a challenge and graphene derivatives have been alternatively exploited to pro...
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Veröffentlicht in: | Nanotechnology 2017-12, Vol.28 (49), p.495711 |
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creator | Jimenez, Mawin J M Oliveira, Rafael F Almeida, Tiago P Ferreira, Rafael C Hensel Bufon, Carlos Cesar B Rodrigues, Varlei Pereira-da-Silva, Marcelo A Gobbi, Ângelo L Piazzetta, Maria H O Riul, Antonio |
description | Graphene is a breakthrough 2D material due to its unique mechanical, electrical, and thermal properties, with considerable responsiveness in real applications. However, the coverage of large areas with pristine graphene is a challenge and graphene derivatives have been alternatively exploited to produce hybrid and composite materials that allow for new developments, considering also the handling of large areas using distinct methodologies. For electronic applications there is significant interest in the investigation of the electrical properties of graphene derivatives and related composites to determine whether the characteristic 2D charge transport of pristine graphene is preserved. Here, we report a systematic study of the charge transport mechanisms of reduced graphene oxide chemically functionalized with sodium polystyrene sulfonate (PSS), named as GPSS. GPSS was produced either as quantum dots (QDs) or nanoplatelets (NPLs), being further nanostructured with poly(diallyldimethylammonium chloride) through the layer-by-layer (LbL) assembly to produce graphene nanocomposites with molecular level control. Current-voltage (I-V) measurements indicated a meticulous growth of the LbL nanostructures onto gold interdigitated electrodes (IDEs), with a space-charge-limited current dominated by a Mott-variable range hopping mechanism. A 2D intra-planar conduction within the GPSS nanostructure was observed, which resulted in effective charge carrier mobility ( ) of 4.7 cm2 V−1 s−1 for the QDs and 34.7 cm2 V−1 s−1 for the NPLs. The LbL assemblies together with the dimension of the materials (QDs or NPLs) were favorably used for the fine tuning and control of the charge carrier mobility inside the LbL nanostructures. Such 2D charge conduction mechanism and high values inside an interlocked multilayered assembly containing graphene-based nanocomposites are of great interest for organic devices and functionalization of interfaces. |
doi_str_mv | 10.1088/1361-6528/aa91c2 |
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However, the coverage of large areas with pristine graphene is a challenge and graphene derivatives have been alternatively exploited to produce hybrid and composite materials that allow for new developments, considering also the handling of large areas using distinct methodologies. For electronic applications there is significant interest in the investigation of the electrical properties of graphene derivatives and related composites to determine whether the characteristic 2D charge transport of pristine graphene is preserved. Here, we report a systematic study of the charge transport mechanisms of reduced graphene oxide chemically functionalized with sodium polystyrene sulfonate (PSS), named as GPSS. GPSS was produced either as quantum dots (QDs) or nanoplatelets (NPLs), being further nanostructured with poly(diallyldimethylammonium chloride) through the layer-by-layer (LbL) assembly to produce graphene nanocomposites with molecular level control. Current-voltage (I-V) measurements indicated a meticulous growth of the LbL nanostructures onto gold interdigitated electrodes (IDEs), with a space-charge-limited current dominated by a Mott-variable range hopping mechanism. A 2D intra-planar conduction within the GPSS nanostructure was observed, which resulted in effective charge carrier mobility ( ) of 4.7 cm2 V−1 s−1 for the QDs and 34.7 cm2 V−1 s−1 for the NPLs. The LbL assemblies together with the dimension of the materials (QDs or NPLs) were favorably used for the fine tuning and control of the charge carrier mobility inside the LbL nanostructures. Such 2D charge conduction mechanism and high values inside an interlocked multilayered assembly containing graphene-based nanocomposites are of great interest for organic devices and functionalization of interfaces.</description><identifier>ISSN: 0957-4484</identifier><identifier>EISSN: 1361-6528</identifier><identifier>DOI: 10.1088/1361-6528/aa91c2</identifier><identifier>PMID: 28985189</identifier><identifier>CODEN: NNOTER</identifier><language>eng</language><publisher>England: IOP Publishing</publisher><subject>charge transport ; layer-by-layer assembly ; nanoplatelets ; quantum dots ; reduced graphene oxide ; space-charge-limited current ; variable-range hopping</subject><ispartof>Nanotechnology, 2017-12, Vol.28 (49), p.495711</ispartof><rights>2017 IOP Publishing Ltd</rights><lds50>peer_reviewed</lds50><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-c370t-3d021bba097d6045297f1bd437fbddd9a80331f03813a5bc67195254d33c873d3</citedby><cites>FETCH-LOGICAL-c370t-3d021bba097d6045297f1bd437fbddd9a80331f03813a5bc67195254d33c873d3</cites><orcidid>0000-0001-8980-3587 ; 0000-0002-7197-4262 ; 0000-0001-5666-6416 ; 0000-0002-9760-1851</orcidid></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><linktopdf>$$Uhttps://iopscience.iop.org/article/10.1088/1361-6528/aa91c2/pdf$$EPDF$$P50$$Giop$$H</linktopdf><link.rule.ids>314,776,780,27901,27902,53821,53868</link.rule.ids><backlink>$$Uhttps://www.ncbi.nlm.nih.gov/pubmed/28985189$$D View this record in MEDLINE/PubMed$$Hfree_for_read</backlink></links><search><creatorcontrib>Jimenez, Mawin J M</creatorcontrib><creatorcontrib>Oliveira, Rafael F</creatorcontrib><creatorcontrib>Almeida, Tiago P</creatorcontrib><creatorcontrib>Ferreira, Rafael C Hensel</creatorcontrib><creatorcontrib>Bufon, Carlos Cesar B</creatorcontrib><creatorcontrib>Rodrigues, Varlei</creatorcontrib><creatorcontrib>Pereira-da-Silva, Marcelo A</creatorcontrib><creatorcontrib>Gobbi, Ângelo L</creatorcontrib><creatorcontrib>Piazzetta, Maria H O</creatorcontrib><creatorcontrib>Riul, Antonio</creatorcontrib><title>Charge carrier transport in defective reduced graphene oxide as quantum dots and nanoplatelets in multilayer films</title><title>Nanotechnology</title><addtitle>NANO</addtitle><addtitle>Nanotechnology</addtitle><description>Graphene is a breakthrough 2D material due to its unique mechanical, electrical, and thermal properties, with considerable responsiveness in real applications. However, the coverage of large areas with pristine graphene is a challenge and graphene derivatives have been alternatively exploited to produce hybrid and composite materials that allow for new developments, considering also the handling of large areas using distinct methodologies. For electronic applications there is significant interest in the investigation of the electrical properties of graphene derivatives and related composites to determine whether the characteristic 2D charge transport of pristine graphene is preserved. Here, we report a systematic study of the charge transport mechanisms of reduced graphene oxide chemically functionalized with sodium polystyrene sulfonate (PSS), named as GPSS. GPSS was produced either as quantum dots (QDs) or nanoplatelets (NPLs), being further nanostructured with poly(diallyldimethylammonium chloride) through the layer-by-layer (LbL) assembly to produce graphene nanocomposites with molecular level control. Current-voltage (I-V) measurements indicated a meticulous growth of the LbL nanostructures onto gold interdigitated electrodes (IDEs), with a space-charge-limited current dominated by a Mott-variable range hopping mechanism. A 2D intra-planar conduction within the GPSS nanostructure was observed, which resulted in effective charge carrier mobility ( ) of 4.7 cm2 V−1 s−1 for the QDs and 34.7 cm2 V−1 s−1 for the NPLs. The LbL assemblies together with the dimension of the materials (QDs or NPLs) were favorably used for the fine tuning and control of the charge carrier mobility inside the LbL nanostructures. Such 2D charge conduction mechanism and high values inside an interlocked multilayered assembly containing graphene-based nanocomposites are of great interest for organic devices and functionalization of interfaces.</description><subject>charge transport</subject><subject>layer-by-layer assembly</subject><subject>nanoplatelets</subject><subject>quantum dots</subject><subject>reduced graphene oxide</subject><subject>space-charge-limited current</subject><subject>variable-range hopping</subject><issn>0957-4484</issn><issn>1361-6528</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2017</creationdate><recordtype>article</recordtype><recordid>eNp9kE1LxDAQhoMo7rp69yS5CtbNNO02OcriFyx40XOYNulul36ZpOL-e1OqnkQYGBje94F5CLkEdgtMiCXwFUSrNBZLRAlFfETmv6djMmcyzaIkEcmMnDm3ZwxAxHBKZrGQIgUh58Sud2i3hhZobWUs9RZb13fW06ql2pSm8NWHodbooTCabi32O9Ma2n1W2lB09H3A1g8N1Z13FFtNW2y7vkZvahMugdIMta9qPAR6WdWNOycnJdbOXHzvBXl7uH9dP0Wbl8fn9d0mKnjGfMQ1iyHPkclMr1iSxjIrIdcJz8pcay1RMM6hZFwAxzQvVhnINE4TzXkhMq75grCJW9jOOWtK1duqQXtQwNSoT42u1OhKTfpC5Wqq9EPeGP1b-PEVAjdToOp6te8G24YP_uNd_xEfDQWkSmSYNANQvS75F5jliPk</recordid><startdate>20171208</startdate><enddate>20171208</enddate><creator>Jimenez, Mawin J M</creator><creator>Oliveira, Rafael F</creator><creator>Almeida, Tiago P</creator><creator>Ferreira, Rafael C Hensel</creator><creator>Bufon, Carlos Cesar B</creator><creator>Rodrigues, Varlei</creator><creator>Pereira-da-Silva, Marcelo A</creator><creator>Gobbi, Ângelo L</creator><creator>Piazzetta, Maria H O</creator><creator>Riul, Antonio</creator><general>IOP Publishing</general><scope>NPM</scope><scope>AAYXX</scope><scope>CITATION</scope><orcidid>https://orcid.org/0000-0001-8980-3587</orcidid><orcidid>https://orcid.org/0000-0002-7197-4262</orcidid><orcidid>https://orcid.org/0000-0001-5666-6416</orcidid><orcidid>https://orcid.org/0000-0002-9760-1851</orcidid></search><sort><creationdate>20171208</creationdate><title>Charge carrier transport in defective reduced graphene oxide as quantum dots and nanoplatelets in multilayer films</title><author>Jimenez, Mawin J M ; Oliveira, Rafael F ; Almeida, Tiago P ; Ferreira, Rafael C Hensel ; Bufon, Carlos Cesar B ; Rodrigues, Varlei ; Pereira-da-Silva, Marcelo A ; Gobbi, Ângelo L ; Piazzetta, Maria H O ; Riul, Antonio</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c370t-3d021bba097d6045297f1bd437fbddd9a80331f03813a5bc67195254d33c873d3</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2017</creationdate><topic>charge transport</topic><topic>layer-by-layer assembly</topic><topic>nanoplatelets</topic><topic>quantum dots</topic><topic>reduced graphene oxide</topic><topic>space-charge-limited current</topic><topic>variable-range hopping</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Jimenez, Mawin J M</creatorcontrib><creatorcontrib>Oliveira, Rafael F</creatorcontrib><creatorcontrib>Almeida, Tiago P</creatorcontrib><creatorcontrib>Ferreira, Rafael C Hensel</creatorcontrib><creatorcontrib>Bufon, Carlos Cesar B</creatorcontrib><creatorcontrib>Rodrigues, Varlei</creatorcontrib><creatorcontrib>Pereira-da-Silva, Marcelo A</creatorcontrib><creatorcontrib>Gobbi, Ângelo L</creatorcontrib><creatorcontrib>Piazzetta, Maria H O</creatorcontrib><creatorcontrib>Riul, Antonio</creatorcontrib><collection>PubMed</collection><collection>CrossRef</collection><jtitle>Nanotechnology</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Jimenez, Mawin J M</au><au>Oliveira, Rafael F</au><au>Almeida, Tiago P</au><au>Ferreira, Rafael C Hensel</au><au>Bufon, Carlos Cesar B</au><au>Rodrigues, Varlei</au><au>Pereira-da-Silva, Marcelo A</au><au>Gobbi, Ângelo L</au><au>Piazzetta, Maria H O</au><au>Riul, Antonio</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Charge carrier transport in defective reduced graphene oxide as quantum dots and nanoplatelets in multilayer films</atitle><jtitle>Nanotechnology</jtitle><stitle>NANO</stitle><addtitle>Nanotechnology</addtitle><date>2017-12-08</date><risdate>2017</risdate><volume>28</volume><issue>49</issue><spage>495711</spage><pages>495711-</pages><issn>0957-4484</issn><eissn>1361-6528</eissn><coden>NNOTER</coden><abstract>Graphene is a breakthrough 2D material due to its unique mechanical, electrical, and thermal properties, with considerable responsiveness in real applications. However, the coverage of large areas with pristine graphene is a challenge and graphene derivatives have been alternatively exploited to produce hybrid and composite materials that allow for new developments, considering also the handling of large areas using distinct methodologies. For electronic applications there is significant interest in the investigation of the electrical properties of graphene derivatives and related composites to determine whether the characteristic 2D charge transport of pristine graphene is preserved. Here, we report a systematic study of the charge transport mechanisms of reduced graphene oxide chemically functionalized with sodium polystyrene sulfonate (PSS), named as GPSS. GPSS was produced either as quantum dots (QDs) or nanoplatelets (NPLs), being further nanostructured with poly(diallyldimethylammonium chloride) through the layer-by-layer (LbL) assembly to produce graphene nanocomposites with molecular level control. Current-voltage (I-V) measurements indicated a meticulous growth of the LbL nanostructures onto gold interdigitated electrodes (IDEs), with a space-charge-limited current dominated by a Mott-variable range hopping mechanism. A 2D intra-planar conduction within the GPSS nanostructure was observed, which resulted in effective charge carrier mobility ( ) of 4.7 cm2 V−1 s−1 for the QDs and 34.7 cm2 V−1 s−1 for the NPLs. The LbL assemblies together with the dimension of the materials (QDs or NPLs) were favorably used for the fine tuning and control of the charge carrier mobility inside the LbL nanostructures. Such 2D charge conduction mechanism and high values inside an interlocked multilayered assembly containing graphene-based nanocomposites are of great interest for organic devices and functionalization of interfaces.</abstract><cop>England</cop><pub>IOP Publishing</pub><pmid>28985189</pmid><doi>10.1088/1361-6528/aa91c2</doi><tpages>11</tpages><orcidid>https://orcid.org/0000-0001-8980-3587</orcidid><orcidid>https://orcid.org/0000-0002-7197-4262</orcidid><orcidid>https://orcid.org/0000-0001-5666-6416</orcidid><orcidid>https://orcid.org/0000-0002-9760-1851</orcidid></addata></record> |
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subjects | charge transport layer-by-layer assembly nanoplatelets quantum dots reduced graphene oxide space-charge-limited current variable-range hopping |
title | Charge carrier transport in defective reduced graphene oxide as quantum dots and nanoplatelets in multilayer films |
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